Upon encountering Vader, Luke ignighted his lightsaber, despite being warned to run by the force ghost of Obi-Wan Kenobi, Luke's old Jedi mentor, and began to duel Vader. Despite his attempts to strike down Vader, Luke was quickly overpowered by the Sith Lord, who recognized him as the rebel who destroyed the Death Star during the Battle of Yavin. After overpowering the boy, Vader took his lightsaber and was about to strike him down when he realized that the lightsaber Luke was using was his very own lightsaber from when he was a Jedi Knight named Anakin Skywalker.